Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). <br> Assertion (A) A simple distillation can be used to separate a mixture of propanol and propanone. <br> Reason (R) Two liquids with a difference of more than $20^\circ {\rm{C}}$ in their boiling points can be separated by simple distillations. <br> In the light of the above statements, choose the most appropriate answer from the options given below.